计算:(1)-4.3-(-6.3)+(-3)(2)(-100)÷5×(-4)(3)2×[5+(-2)3](4)-6×(-16)-7;(5
计算:(1)-4.3-(-6.3)+(-3)(2)(-100)÷5×(-4)(3)2×[5+(-2)3](4)-6×(-16)-7;(5)(-3)2×(-13)2-(-2...
计算:(1)-4.3-(-6.3)+(-3)(2)(-100)÷5×(-4)(3)2×[5+(-2)3](4)-6×(-16)-7;(5)(-3)2×(-13)2-(-2)3÷(-12)2(6)-997172×36(用简便方法计算)
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(1)-4.3-(-6.3)配逗+(-3)
=-4.3+6.3-3
=-7.3+6.3
=-1;
(2)逗卖山(-100)÷5×(-4)
=-20×(-4)
=80;山中
(3)2×[5+(-2)3]
=2×[5-8]
=-2×3
=-6;
(4)-6×(-
)-7
=1-7
=-6;
(5)(-3)2×(-
)2-(-2)3÷(-
)2
=9×
+8÷
=1+32
=33;
(6)-99
×36
=(-100+
)×36
=-3600+
=-3599
.
=-4.3+6.3-3
=-7.3+6.3
=-1;
(2)逗卖山(-100)÷5×(-4)
=-20×(-4)
=80;山中
(3)2×[5+(-2)3]
=2×[5-8]
=-2×3
=-6;
(4)-6×(-
1 |
6 |
=1-7
=-6;
(5)(-3)2×(-
1 |
3 |
1 |
2 |
=9×
1 |
9 |
1 |
4 |
=1+32
=33;
(6)-99
71 |
72 |
=(-100+
1 |
72 |
=-3600+
1 |
2 |
=-3599
1 |
2 |
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